The use of the concepts of purchasing, procurement, supply, and supply chain management will vary from organization to organization depending on:
A. the organization's stage of development and/or sophistication.
B. the industry in which they operate.
C. the organization's competitive position.
D. the organization's stage of development and/or sophistication, the industry in which they operate and the organization's competitive position.
E. the organization's stage of development and/or sophistication and the industry in which they operate.

B. The industry which they operate

Explanation:Different companies carry out the functions of purchasing, procurement and supply differently and these depend on how they operate. For example supply chain in a manufacturing company, it will produce items that will be stored in warehouses and other locations, making the supply chain more complex, on the other hand if it's a Service Provider company which uses a make-to-order business model, there will be no need for storing finished products, Therefore, it is clear that supply chains including procurement , purchasing and supply depend on the nature of the company.

i would say their habit of breaking down.